Process of concreting in plinth beam
Process of Concreting in Plinth Beam Construction of plinth work involves the following kind of work in Building Construction So Must Read and Note
Process of Concreting in Plinth Beam
Construction of plinth work involves the following kind of work in Building Construction
- Casting of columns up to the plinth level.
- Constructing rubble/brick masonry up to the plinth level.
- The casting of plinth/tie beams at the designed level.
- Anti-termite treatment in foundation.
- Refilling of column pits and plinth with selected material.
- Soling over the compact refilled material.
- D.P.C. over plinth walls.
- Floor P.C.C.
- Plinth protection.
Casting And Checking of Columns up to Plinth
- After casting of footings done, mark the centre line of columns on the footing.
- Erect the column cage by checking the number of reinforcement bars, the diameter of bars, spacing, and type of links (rings).
- Provide the length of column bars up to the beam level, considering the appropriate lap length of the bars.
- Cast the column up to the plinth level or up to the bottom level of the tie plinth beam work procedure.
- Check the proper covering for column reinforcement.
- Check the unsupported height of the column for slenderness, from footing top to bottom of the beam. If the height is beyond limits, inform the Structural Consultant and provide an intermediate tie beam.
- Check the offsets of the column as per the drawing.
- Check the mix before casting.
- Maintain a proper water-cement ratio.
- Compact the concrete with a needle vibrator.
Plinth Tie Beams Work Procedure – Casting And Checking
- The plinth level is first finalized with respect to the parking ground level.
- The plinth beam work procedure can be cast by adopting the usual procedure of propping and shuttering.
- Tie beams may be cast on masonry work at the plinth level. The only side shuttering and supports are required in this case.
- The bottom of the peripheral plinth beam should be kept 15cm below the existing ground level and necessary plinth masonry should be done above the beam.
Checklist For Plinth Beam Work Procedure
- The size (b x d) of the beam.
- Reinforcement of the beam as per the structural drawing.
- Proper anchorage of the bottom and top bars in the columns.
- Length of continuation of bent bars and extra top bars over supports.
- The face of the column on which the beam rests (This confirms the room dimensions and any architectural feature if involved).
- The diameter of the stirrup bar and the spacing of the stirrups.
- The bottom and side cover for reinforcement to be provided.
- Controlling the proportion of the concrete mix.
- Ensuring and checking of line, level, plumb, and supports of the shuttering.
- Plugging of all possible joints of shuttering from where the cement slurry may flow out while vibrating the concrete.
- Confirm the change in concrete grade for beams and columns (if any).
- Ensure the compaction of the concrete.
Checklist Of Plinth Beam Work
- Check the level of masonry work with respect to the plinth level.
- Check that all stub columns are cast (2″) above the plinth or up to the bottom of the plinth beam work procedure as required.
- Check the lap lengths provided for all bars above the plinth for adequate length.
- Check the faces of the columns on which the plinth beam rests.
- Reduction of columns, if any, should be done at the beam level only.
- Check the distance between masonry walls for room dimensions.
- Check the size of the plinth beams and the reinforcement of the same.
- Check the proper anchorage of plinth beam bars in columns.
- Check the shuttering of the plinth beam work procedure for alignment, level, plumb, and supports.
- Check and cast the beams and columns with proper grade of concrete, ensuring the required covers to the reinforcement.
- Control the design mix of concrete, carry out the compaction by means of a vibrator.
- Cure the concrete/masonry work. Remove all grass shrubs and loose material from the plinth area.
- Fill the plinth with murum or approved excavated stuff.
- See that filling is done in layers, watered and compacted, no layer being greater than 15cm to 20cm (6″ to 8″)
- Check and keep the proper sunks for W.C. bath and toilets.
- Over compacted filling, hand-packed rubble soling of proper thickness should be done.
- Check the quality of the soling material. Compact the soling and fill the gaps with chips.
- Get the side shuttering for P.C.C. and mark the exact level of the P.C.C. top.
- Take intermediate thiyyas and confirm the uniform thickness of P.C.C. throughout.
- Rectify the ups and downs, observed in the above points.
- Do the P.C.C. by hand mix/mixer.
- Compact the P.C.C. with a rammer.
- Level and finish the P.C.C.
- Check the drawing to see if the plinth is given or not.
- If yes, follow the procedure specified and complete the plinth protection.
- Construct the steps of the plinth (in masonry) keeping the margin for the floor finish. Do not confuse the plinth level with F.F.L. (Floor Finish Level)